Method, device and computer program product for demultiplexing of video images

A method for demultiplexing time-division multiplexed digital video data which originates from multiple sources, the method comprising:

• retrieving a first set of digital video data representative of an image;
• storing the first set of digital video data to a memory location associated with a first source such that the first set of digital video is representative digital video of the first source;
• retrieving a current set of digital video data representative of an image;
• selecting a subset of the first set of digital video data;
• selecting a subset of the current set of digital video data such that the subset of the first set and the subset of the current set contain identical pixel locations;
• calculating a difference measurement between the subset of the first set and the subset of the current set;
• calculating a difference ratio based upon the difference measurement;
• and
• if the difference ratio is above a threshold, producing a display query requiring response for classifying the digital video data as belonging to an identified source or originating from a new source.

A computer program product comprising a non-transitory computer readable storage medium storing a computer program having computer readable code executable by a computer for demultiplexing time-division multiplexed digital video data which originates from multiple sources, the computer program comprising:

• computer code for retrieving a first set of digital video data representative of a first image;
• computer code for storing the first set of digital video data to a memory location associated with a first source;
• computer code for retrieving a current set of digital video data representative of a current image;
• computer code for calculating a difference ratio using the first set of digital video data and the current set of digital video data;
• and
• computer code for producing a display query requiring response for classifying the digital video data as belonging to an identified source or originating from a new source if the difference ratio is above a threshold, wherein the first source is an identified source.

A computer program product comprising a non-transitory computer readable storage medium having a computer readable code executed by a computer for demultiplexing time-division multiplexed digital video data which originates from multiple sources, the computer program comprising:

• computer code for retrieving a first set of digital video data representative of an image;
• computer code for storing the first set of digital video data to a memory location associated with a first source such that the first set of digital video is representative digital video of the first source;
• computer code for retrieving a current set of digital video data representative of an image;
• computer code for selecting a subset of the first set of digital video data;
• computer code for selecting a subset of the current set of digital video data such that the subset of the first set and the subset of the current set contain identical pixel locations;
• computer code for calculating a difference measurement between the subset of the first set and the subset of the current set;
• computer code for calculating a difference ratio based upon the difference measurement;
• and
• computer code for producing a display query requiring response for classifying the digital video data as belonging to an identified source or originating from a new source if the difference ratio is above a threshold.

A device for demultiplexing time-division multiplexed digital video data which originates from multiple sources, the device comprising:

• a retrieval module for retrieving a first set of digital video data representative of a first image and retrieving a current set of digital video data representative of a current image;
• a storage module for storing the first set of digital video data to a memory location associated with a first source;
• a calculation module for calculating a difference ratio using the first set of digital video data and the current set of digital video data;
• and
• a query module for producing a display query requiring response for classifying the digital video data as belonging to an identified source or originating from a new source if the difference ratio is above a threshold, wherein the first source is an identified source.